地铁无线通信多系统接入的抗干扰技术及覆盖效果测试

Anti-jamming Technology and Coverage Effect Test of Subway Wireless Communication Multi-system Access

多系统接入平台(POI)是连接公众网信源与宽频覆盖网的桥梁,它不仅支持多系统、多频段信号的双向传输,而且还具有大功率、低损耗、强隔离、高稳定性等特点。将POI应用到地铁无线通信系统中,可以实现对地铁隧道、站厅、站台处的信号全覆盖,并且能够维持信号强度。本文首先介绍了地铁无线通信多系统接入时使用到的抗干扰技术,包括科学布置滤波器、加强系统隔离度、合理设置天馈系统等。在此基础上,以某市地铁2号线为例,展开了无线通信多系统接入平台的信号覆盖效果测试。结果表明,地铁站厅1800MHz信号覆盖场强在-85dBm以上的占整个测试区域的100%,达到了预期目标。

The multi-system access platform(POI)is a bridge connecting the public network information source and the broadband coverage network.It not only supports the bidirectional transmission of multi-system and multi-band signals,but also has high power,low loss,strong isolation,and high stability.gender and other characteristics.The application of POI to the subway wireless communication system can achieve full coverage of the subway tunnels,station halls,and platforms,and can maintain signal strength.This paper firstly introduces the anti-jamming technology used in the multi-system access of subway wireless communication,including scientific arrangement of filters,strengthening of system isolation,and reasonable setting of antenna feeder systems.On this basis,taking the subway line 2 of a certain city as an example,the signal coverage effect test of the wireless communication multi-system access platform was carried out.The results show that the 1800MHz signal in the subway station hall covers 100%of the entire test area with a field strength above-85dBm,which has achieved the expected goal.